Melting point :300 °C
Density :2.064g/cm3 at 20℃
bulk density :465kg/m3
vapor pressure :0Pa at 25℃
storage temp. :Store at +15°C to +25°C.
solubility :1350g/l
form :Powder
color :Off-white
PH :5.0 (10g/l, H2O, 20℃)
Water Solubility :soluble
Sensitive :Hygroscopic
λmax :290-291 nm (buffer pH 2.5)
Merck :14,9465
BRN :4629740
Stability :Stable. Incompatible with strong oxidizing agents.
InChI :1S/C6H6O8S2.2Na/c7-4-1-3(15(9,10)11)2-5(6(4)8)16(12,13)14;;/h1-2,7-8H,(H,9,10,11)(H,12,13,14);;/q;2*+1/p-2
InChIKey :ISWQCIVKKSOKNN-UHFFFAOYSA-L
SMILES :[Na+].[Na+].[S](=O)(=O)(O)c1c(c(cc(c1)[S](=O)(=O)O)[O-])[O-]
LogP :0.3 at 25℃ and pH6.5
Surface tension :72.83mN/m at 1g/L and 19.5℃
CAS DataBase Reference :149-45-1(CAS DataBase Reference)
EPA Substance Registry System :Disodium 4,5-dihydroxy-1,3-benzenedisulfonate (149-45-1)

Symbol(GHS):
Signal word:	Warning
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
Precautionary statements:	P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P280 Wear protective gloves/protective clothing/eye protection/face protection. P302+P352 IF ON SKIN: wash with plenty of soap and water. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P332+P313 IF SKIN irritation occurs: Get medical advice/attention. P337+P313 IF eye irritation persists: Get medical advice/attention.